Can I use Synthetic oil for Tiburon?

You can use synthetic in any engine as long a it is the proper weight recommended by the manufacturer. I had a Grand Marquis that called for 5w-20 Motor-Craft semi synthetic oil. I tried the expensive 0w-30 Mobil full synthetic and it made no difference in gas mileage. I now use the semi-synthetic Motor-craft oil in all my non Ford vehicles. Avg increase was about one mpg over conventional oil. Plus the Motor-craft oil is cheaper than most brand name conventional oils. Good Luck